Lorenzo von Matterhorn
- Jan 31, 2009
- Reaction score
Very interesting and thorough.
VLF is not only very low, it's VERY slow (35 bits per second), and very energy intensive. You likely couldn't transmit enough data to control the torpedo, and doing so would reveal the sub's position.Interesting, how many firms worked on that torp? Gould, Westinghouse, Alliant Tech Systems, now Hughes! I always thought that trailing wire control thing was odd, if the subs can communicate with the VLF radio underwater, why not talk to the torps that way? So the seeker does look up, it thought the heli waves on the surface was a wake. This is probably something we should not be talking about..
The Confederate sub Hunley was the first to sink a ship, with a spar charge, a hook rammed into the wood would hold the charge, then they backed off. I was wondering how they could light the fuse underwater, doh, so looked into it. Turns out they used a flintlock thing or rifle cartridge with firing pin, if available at the time, to set it off, with a really long string. But even a 1000' string might not be enough. They did not understand back then how well sound and pressure disturbances traveled thru water. The blast effects sunk the sub.
I can rant about torp sonars, sat next to the guy who designed them. Funny piezo discs like lifesavers candy, high voltage drive, one system was about 14KW, they said it would kill a frogman in front of it.